Khan Academy
Khan Academy: Triangles: Intro to Triangle Similarity
Explains what it means for two triangles to be similar. Diagram of similar triangles is created with two parallel lines cut by two transversals.
Loyola University Chicago
Math Flix: Similar Figures: Proof Using Proportions
This QuickTime movie provides an opportunity to develop the basic geometric term, similar, by checking to see if figures are proportionaly similar. As you watch and listen to the teacher and student interact it helps clarify the thinking...
Virtual Nerd
Virtual Nerd: What Is a Ray?
Rays are very useful as two rays can create an angle, multiple angles can create a polygon, and by adding another dimension you get three-dimensional solids. This tutorial introduces you to rays and shows you how to name them. [4:51]
Loyola University Chicago
Math Flix: Congruency
This QuickTime movie provides an opportunity to learn about the basic geometric term congruency. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.
Loyola University Chicago
Math Flix: Similar Figures: Cross Multiplication
This QuickTime movie provides an opportunity to develop the basic geometric term, similar, by using cross multiplication to see if figures are similar. As you watch and listen to the teacher and student interact it helps clarify the...
Virtual Nerd
Virtual Nerd: What Is a Plane?
This tutorial introduces planes and shows how to name them. [3:44]
Virtual Nerd
Virtual Nerd: What Are Vertical Angles?
Vertical angles are always congruent to one another. Take a look at this tutorial to learn about and see how to identify vertical angles. [4:07]
Virtual Nerd
Virtual Nerd: How Do You Use Complementary Angles to Find a Missing Angle?
View this tutorial to see how to use what you know about complementary angles to find a missing angle measurement. [3:20]
Loyola University Chicago
Math Flix: Similar Figures: Ratio
This QuickTime movie provides an opportunity to develop the basic geometric term, similar, by using a ratio to see if figures are similar. As you watch and listen to the teacher and student interact it helps clarify the thinking behind...
Virtual Nerd
Virtual Nerd: How Do You Find Missing Angles in a Transversal Diagram?
Take a look at this tutorial to see how to find all the missing angle measurements by identifying vertical, corresponding, adjacent, and alternate exterior angles. [4:43]
Virtual Nerd
Virtual Nerd: What Is a Degree?
Watch this tutorial to learn what a degree is and how it relates to a circle. [3:08]
Virtual Nerd
Virtual Nerd: What Are Complementary Angles?
Complementary angles always add up to 90 degrees. Watch this tutorial to learn about complementary angles and see how to use this knowledge to solve a problem involving these special types of angles. [3:20]
Virtual Nerd
Virtual Nerd: What Are Supplementary Angles?
Take a look at this tutorial as it introduces you to supplementary angles and shows you how to use them to solve for a missing angle measurement. [3:20]
Virtual Nerd
Virtual Nerd: What Is an Angle?
Take a look at this tutorial to learn about how an angle is formed, how to name an angle, and how an angle is measured. [4:45]
Virtual Nerd
Virtual Nerd: How Do You Find Angle Measures for Adjacent Angles?
In this tutorial, students will learn how to find missing angle measurements by first creating an equation. [4:20]
Virtual Nerd
Virtual Nerd: How Do You Use Supplementary Angles to Find a Missing Angle?
In this tutorial, you'll see how to use your knowledge of supplementary angles to set up an equation and solve for a missing angle measurement. [3:41]
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